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Using deep images and simulations to trace collisional debris around massive galaxies

Published online by Cambridge University Press:  21 March 2017

Pierre-Alain Duc
Pierre-Alain Duc*
Affiliation:
AIM Paris-Saclay, Service d’astrophysique, CEA-Saclay, 91191 Gif sur Yvette, France email: paduc@cea.fr
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Abstract

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Deep imaging programs, such as MATLAS which has just been completed at the CFHT, allows us to study with their diffuse light the outer stellar populations around large number of galaxies. We have carried out a systematic census of their fine structures, i.e. the collisional debris from past mergers. We have identified among them stellar streams from minor mergers, tidal tails from gas-rich major mergers, plumes from gas-poor major mergers, and shells from intermediate mass mergers. Having estimated the visibility and life time of each of these structures with numerical simulations, we can reconstruct the past mass assembly of the host galaxy. Preliminary statistical results based on a sample of 360 massive nearby galaxies are presented.

Keywords

galaxies: interactions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 180 - 182
Copyright
Copyright © International Astronomical Union 2017 

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